4 Inch 40W Utility High Power LED Work Light EMC CISPR 25 CLASS 4
The SLL-4041 is a 4 inch high power LED work light designed for vehicles and heavy machinery that operate in harsh environments with vibration, dust, and water exposure. Four 10W CREE LEDs deliver 3200 lumens in a flood beam pattern, providing even illumination across the immediate work zone without creating a hot spot. The die-cast aluminium housing with UV resistant polyester powder coating and IP68 sealing ensures long-term durability. The lamp is EMC compliant to CISPR 25 Class 4 and carries ECE R10 approval, which is required for electrical compatibility on machines that operate on public roads.
- 3200 lumens in a flood beam pattern evenly illuminates the work area around the machine instead of concentrating light in a narrow spot
- IP68 sealing and a durable cable entry gland prevent water and dust ingress during pressure washing or exposure to rain
- EMC protection to CISPR 25 Class 4 ensures the lamp does not interfere with vehicle electronics or fail in electromagnetic environments
- ECE R10 approval means the lamp meets European standards for electrical interference and can be used on road going machines
- 9 to 32V DC operation allows the same part number to be used on both 12V and 24V fleets, reducing SKU count
Where This Lamp Is Used
- Front and side work lighting on excavators and loaders operating in low light or night shifts
- Cab and hood lighting on trucks and buses used in remote or rural areas with poor street lighting
- Auxiliary lighting on forklifts and material handling equipment in warehouses with high ceilings
- Lighting on engineering vehicles and service trucks that operate in wet or dusty conditions
- Support lighting on mining and construction machinery where electrical noise from motors can disrupt sensitive systems
Who It Is For
- Distributors of vehicle lighting who need a single part number for 12V and 24V systems
- Machinery OEMs integrating lighting into production line builds and requiring consistent mounting and electrical specs
- Fleet operators replacing halogen or low-output LED lamps that fail under vibration or electrical noise
- 4x4 and industrial accessory brands developing private label work lights with certified EMC performance
- Equipment dealers fitting lighting on machines that must pass road inspection in Europe or North America
Problems It Solves
- Halogen work lamps draw excessive current and fail quickly under vibration, leading to frequent replacements
- Cheap LED lamps without EMC protection can cause interference with vehicle ECUs, leading to error codes or system failures
- Lamps without ECE R10 approval may be rejected during road inspection on machines used on public roads
- Narrow beam lamps leave the near edges of the machine dark, increasing risk during close proximity work
- Painted metal housings and plastic lenses degrade under UV exposure and vibration, leading to early failure
Technical Features
- Four 10W CREE LEDs with a total real power draw of 40W and a maximum rating of 40W
- Flood beam pattern with a 3200 lumen output, suitable for close-range work illumination
- Semi-gloss black UV resistant polyester powder coating on the full housing and bracket
- Bare wire lead of 40cm as standard with Deutsch connector available on request
- EMC protection to CISPR 25 Class 4 and overvoltage/overheat protection built into the driver
- Operating voltage range of 9 to 32V DC, compatible with 12V and 24V vehicle systems
- Rated for more than 50,000 hours of operation under normal conditions
- Sealed cable entry gland and silicone gasket maintain IP68 rating under dynamic conditions
Technical Specification
Values taken from the original factory specification for this model. Fields the factory sheet does not state are left out rather than estimated.
| Part Number | SLL-4041 |
|---|---|
| Max Power | 40W |
| Real Power | 40W |
| LED | 4 pcs x 10W CREE |
| Beam Pattern | Flood |
| Colour Temperature | 6000K |
| Operating Voltage | 9-32V DC |
| Lens Material | Anti-scratch, UV resistant polycarbonate |
| Waterproof Rating | IP68 |
| Operating Temperature | -40 to +60 degrees Celsius |
| Electrical Connection | Bare wire 40cm, Deutsch connector available |
| Certification | CE, RoHS, EMC, ECE R10, CISPR 25 Class 4, IP68 |
Materials Used
- Anti-scratch, UV resistant polycarbonate lens
- Silicone rubber gasket and sealed cable entry gland
- UV resistant polyester powder coating
How This Lamp Is Built
Die casting of the aluminium housing and heat sink
Powder coating in semi-gloss black with UV protection
LED board assembly with CREE emitters
Lens bonding and gasket sealing
Quality Control on This Model
- Photometric output verified in an integrating sphere
- Sealing verified against the IP68 rating before shipment
- Vibration testing on a vibration test machine to simulate machine-mounted service
- Salt spray corrosion testing on housing coating and stainless bracket
- High and low temperature alternating humidity testing across the -40 to +60 degrees Celsius window
- EMC testing to CISPR 25 Class 4 in a shielded chamber
Customisation Options
- Deutsch DT connector instead of the standard 40cm bare wire lead
- Spot beam optics in place of the flood pattern
- Private label logo on the housing and printed carton
- Alternative cable length for a specific machine harness
- Mixed cartons combining this lamp with other SUNLITEC models for trial orders
How It Compares With the Alternatives
| Round 4 inch work lamp | The square body uses the same mounting footprint but provides more LED surface area for better heat dissipation and light output |
|---|---|
| Spot beam version of the same lamp | Flood covers the near working area evenly while spot reaches further ahead but leaves the machine edges dark |
| Larger 6 inch work lamp | Lower output but fits tight spaces like cab pillars and guard rails where a 6 inch body would not clear |
How to Fit and Use It
- Leave a drip loop in the 40cm lead so water runs away from the gland rather than into it
- Aim the flood beam at the immediate work zone close to the machine and use a spot lamp separately for distance
- Clean the PC lens with water and a soft cloth only—solvents will degrade the anti-scratch coating
Questions About This Model
Can I order a sample before placing a bulk order
Yes. Sample orders are welcome and mixed samples of different models in one shipment are accepted.
What is the lead time
Sample orders normally take around 3 to 7 working days. Bulk lead time depends on the model and the quantity ordered.
Do you have a minimum order quantity
There is an MOQ for standard orders, but smaller orders are also accepted, which suits distributors testing a new model.
How is the lamp shipped
Samples usually go by DHL, UPS, FedEx or TNT in around 4 to 7 days. Bulk orders ship by air in about 7 to 15 days or by sea in about 15 to 30 days.
Will this lamp work on both 12V and 24V machines
Yes. The operating range is 9 to 32V DC, so the same part number can be fitted to 12V and 24V vehicles.
Can you supply the lamp with our own brand
Yes. OEM and ODM service is available, including a private label logo on the housing and printed cartons.
Is it approved for road going machines
The lamp is CE and RoHS compliant, carries ECE R10 approval for electromagnetic compatibility, and meets CISPR 25 Class 4 EMC standards.
Get a Price on 4 Inch 40W Utility High Power LED Work Light EMC
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